sandbox: Unprotect DATA regions in bus tests
On my Ubuntu 18.04.1 machine two driver-model bus tests have started
failing recently. The problem appears to be that the DATA region of the
executable is protected. This does not seem correct, but perhaps there
is a reason.
To work around it, unprotect the regions in these tests before accessing
them.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index 9fbcb9e..d4d6d78 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -636,3 +636,14 @@
{
abort();
}
+
+int os_mprotect_allow(void *start, size_t len)
+{
+ int page_size = getpagesize();
+
+ /* Move start to the start of a page, len to the end */
+ start = (void *)(((ulong)start) & ~(page_size - 1));
+ len = (len + page_size * 2) & ~(page_size - 1);
+
+ return mprotect(start, len, PROT_READ | PROT_WRITE);
+}